Conveyer for use with furnaces



Jan/7, 1930. A. CARTWRIGH F CONVEYEH FOR USE WITH FURNACES 1 Filed May 18, 1928 s sheets-sheet 1 [NVENTUR f If. warm/6H7 ATTORNEY "Jan. 7, 1930.

4 H. A. CARTWRIGHT CONVEYER FOR USE WITH FURNACES Filed May 18, 1928 I5 Sheets-Sheet 5 INVENTOR v f f1 QiRTNR/GHZ- ATTORNEY Patented Jan. 7, 1930 UNITED STATES PATENT OFFICE.

v HORACE A. OARTWRIGHT, OF TOLEDO, OHIO, ASSIGNOR TO THE SURFACE COMBUSTION COMPANY, IMO, TOLEDO, OHIO, A CORPORATION OF NEW YORK along a given path-of travel.

CONVEYER FOR USE WITH FURNACES Application filed May 18, 1228. Serial No. 278,682. I

This invention relates generally to improvements in conveyers of the type adapted to progress ortranslate materlal step by step The invention has among-its objects to provide a conveyer of thetype indicated which shall be particularly well adapted for use in connection with furnaces wherein the con-.

veyed material is tobe heated, which shall be simple in construction, reliable'in operation, and otherwise well adapted for its intended purpose.

Inaccordance with this invention the con veyer comprises in' combination with a supporting means on which the material to be conveyed is normally-supported between, periods of translation or progresslon, a mate rial progressing means which includes a reciprocable carriage and a material translating member supported by and reciprocable with respect to said carriage.

For a more complete understanding of the invention reference is made to the detailed description and the accompanying drawings forming part of-thisspecification.-

In the drawings, Fig. 1 is a side elevation of proved conveyer associated therewith;

Fig. 2 is a side elevation on an enlarged scale'of a portion of the conveyer meghanism shownin Fig. 1;

Fig. 3 is a cross section of'the furnace and conveyer shown in Fig. 1

Fig. 4 is a cross section of the'conveyer, the view being taken on line H of Fig. 2;

F ig. 5is a cross section of a modified form of conveyer embodying the principles of the present invention; 1

.Fig. 6 illustrates how the form of the invention shown inFig. 5 isadapted for use with a furnace through which'the whole of an object may be passed for heating, and

Figs. 7 and 8 areschematic views for explaining the cycle of movement of the conveyer mechanism. f

-The conveyer mechanism comprises among its elements a reciprocable carriage, a stepped track on which the carriage travels, a work elevating and translating member mounted for reciprocation on said carriage, and means 2 a bolt-blank heating furnace having the iming-a raised and cored boss 27 for sup for supporting the'work between periods of elevation and translation. I The conveyer mechanism illustrated in Figs. 1 to 4 is adapted for use inconnection with a trunliel-like furnace having a longitudinally extending side opening 10-through which the work, as for example, bolt blanks 11 may project into the furnace chamber from the outside thereof. The furnace is shown as supported on-a bench-like frame work 12 which at one side has an elevated portion 14 on which the ported.

Suitably secured to said elevated portion 14 of the frame work 12 is a longitudinally ex tending channel iron 16 which constitutes the base of the conveyer. Secured to the sides of said iron at appropriate points along its length are oppositely positioned, relatively short, stepped track sections generally indicated by letter A. The track surface of each of said sections is the same and-includes lower and upper runways18 and 20, respectively, connected by an 1 inclined runway 22. On these track sections, acarriage generally indicated by letter B is adapted to bereciprorated.

The carriage is a relatively long affair.

nected at appropriate points by elements 26. These elements are preferably castings havorting individual shafts 28. Mounted on t e projecting ends of each shaft are carriage sup porting rollers 30 adapted to run on the tracks A.. The rollers are kept to their tracks by guide blocks 32 which extend betweenoppo site track sections and which are secured to the side flanges of the angle irons 24. Also "mounted on the ends of each shaft 28 are rollers 34 on which the work elevating and conveyer mechanism is sup- The frame work of the carriage includes a. pair of laterally spaced,-longitu'dinally ex v v tending angle irons 24 which are cross coni translating member generally indicated by letter C is mounted for reciprocation.

The work moving member C comprises a pair of laterally spaced, longitudinally-extending rails 36 cross connected at suitable points by tie rods 38 (see Fig. 2). The inner bottom corners of the rails are angled as indicated at 40 to form runwaysfor the outer rollers 34. The rails may be of hollow construction as shown to permit the passage of cooling water therethrough.

'- The means for supporting the work be tween periods oftranslation is indicatedgenerally by letter' D and comprises a pair of laterally' spaced, longitudinally extending -rails 42 cross connected at appropriate tive reciprocation in a manner hereinafter explained. At this point it will be sufiicient to ,say that the means for reciprocating said carriage and membermay take the form of a crank shaft with appropriate'connecting rods, A simple driving arrangement. is

shown in Fig. 1. An electric motor is utilized to drive two cranks of different throw or radius positioned at right angles to -each.ot her. One of these cranks is indicated by reference character 52 and the other by 54. Extendin from crank 54to the work'movingmember is apitman 5'6 and from crank arm 52 to the carriage B is a'pitman 58.

These pitmen connect with the reciprocable meansat suitable points as will be readily understood. vThuspitman 58-may connect with the carriage through lugs 60 (see Fig. 4)

depending'from thecarriage'element 26 and moving member C '(C), which is supported of operation as the previously described mem the p}itman-56 to the adjacent end ofthe member.,

Before describing the mode of operation of the conveyer mechanism thus far described,

' the modified form of the invention shown i modifiedxform 'ofthei'lnvention 1s primarily Figs. 5 and-61 'Willffirst be described. The

adapted for use witligiurnaces of the type in 'dicated .6, thatis'to say, with furnaces into which the work 'as' a whole maybe entered for passage therethrouih. The furnace is shownas having a'heart or floor below which the major part of theconveyer mechanism is positioned. The furnace floor is 'divided longitudinally by channel and slot both generally indicated by reference character 62. Positioned in the channel is a work elevating and translating member C consisting of a pair of laterally spaced, longit'udinally extending rails 36 cross connected by brackets 64 at appropriate points. Each bracket is mounted on. or. forms the top of a pedestal or i post 66 having a base 68 by means of which it is secured to a reciprocating member which,

together with the rails 36-within the furnace chamber, constitutes the work elevating and translating means C havingthe same mode.

ber C.

' The hearth sections D" on either side of the channel and slot62 togetherserve to support the work between periods of elevation and translation by the member C. The member 0' is a frame work which includes, in .addition to the parts already mentioned,-a pair of laterally spaced, longitudinally extending channel irons 7 O which are secured to the tops of the pedestal bases 68 for the purpose of making up a rigid tructure. The bases 68 are sufiiciently broa lengthwise of the chan I nel irons 70 to provide a runway for rollers 34; on which the member 0' as a whole 15 supported; The rollers 34 are part of a. carriage B corresponding to the previously described carriage B. .While' the two carriages are shown as difiering somewhat in details of construction, functionally they are'the same.

The frame of carriage B is made up of a single longitudinally extending channel iron 72, the side fiangesbeing turned downward.

The carriage supporting rollers 30 are. mounted in pairs, a pair for each track section A which as shown isof twin construcface as the previously described track A. As a means for confining the rollers 30 to their tracks there is provided'on each track sec- 'tion' but having the same type of stepped surtion a ridge 74011 either side .of which the ro'llers' run. I

The mode of operationof the 'conveyer will now be described. Between periods-of trans lation the work is supported on'the fixedsupportD (D). As carriage B (B) moves back and forth on its track A (A) the work C (C the latter is moved horizontally to shift the work longitudinally of said sup port. Upon completion ofits work shifting stroke, the member C (C) is lowered to redeposit the work on the support, the lowering of said member taking place by reason of the carriage travelling down the incline 22 of its track A (A) Upon the carriage arriving at the lower level 18 of. its track, the member C (C) begins to-move back toward its starting point and continues so to move while the car: riage moves forward and backward on its lower track level 18. Upon the carriage reachingthe incline 22 on its return stroke,

the forward movement of the member 0 (C) member C C) is ready for its work shifting stroke. During the work shifting stroke of member C (C) the carriage moves forwardand backward on the upper track surface 20.

'The'cycle of movement above described may be more readily understood by reference -to 'Figs. 7 and; 8. The large circle 52 in Fig.7 indicates the orbit of the carriage crank 52 and the large circle 5fPthe orbit of the crank 54. for' the work moving member C, object along said support when the carriage these'circles being divided into twelve equal parts to facilitate description. Crank 54 is 90 in advance of crank 52. When thevcrank. 52 "is at of the carriage B is moving toward the left-on its upper track level .20, The corresponding position of crank 54 is'at/w', The

work moving member 'C- is therefore moving toward the right. When. crank 52 is at 0 crank 54 is at w Member C is therefore approaching the end of a stroke whereascarriage B is about to move down the inclined track surface 22 whereupon member'C will be lowered to redeposit the work on the lixed supports. When crank 52 is at 0 crank 54; is at 'w from which it will be seen that member C is moving in opposition to thecarriage B. When crank 52 is at oflcrank 54 is at w. The carriage B is therefore about to'move up the inclined track surface 22 and member C 1s approaching the end'of its stroke. From the foregoing description the mode of operation of the conveyer should be readily apparent. V

A conveyer constructed in accordance with the present invention is relatively simple in construction and is readily adaptable to different types of furnaces as indicated in'Figs. 3 and 6, As indicated in Fig. 1 the work will preferably be delivered to the conveyer from a source of supply such-as a hopper.

l/Vhatis claimed is: 1. In a conveyer adapted to move objects step by step along a work support, the combination of means forming said support, a reciprocable carriage movable in one plane for a portion of its length of travel-and in a higher plane for the remainder. of said length, and

independently reciprocable means mounted on said carriage for moving the objects along said support when the carriage is moving in said higher plane Y 2. Ina com'eyer adapted to move objects step by step along a work support, the combination of means forming said support, a reciprocable carriage below said support, means for causing said carriage to travel in one plane for a portion of its length of travel and in a higher plane forthe remainder of said length, and independently reciprocable means mounted on said carriage for moving the objects along said path when the carriage is moving in said higher plane.

3. In a conveyer adapted to move objects step by step along a work support, the combination of means forming said support, a

reciprocable carriage below said support,

a track on which said carriage is supported for travel, said track for a portion of its length being in one plane and in ahigher plane for the remainder of said length whereby the carriage in traversing thelength of said track moves in two successive planes, and independently reciprocable means mounted on said carriage for moving the of said support when t longer lengtl 1 of travel than said independently reciprocable means.

6. A conveyer according to clalm 3 charindepen- I acterized by the fact that said carriage has a i longerlength of travel than said independently recip'rocable means. p

7. A-,conveyer as claimedf'in claim 1, including means for reciprocating said carriage and said independently ,reciprocable means in a manner to cause the carriage to reverse its direction of travel after said reciprocable means has reversed its direction of'travel.

8. A conveyer. as claimed in claim 2, ineluding means for reciprocating said carriage and said independently reciprocable means in a manner to cause the carriage to reverse its direction of travel after saidreciprocable means has reversed its direction of travel.

9. A conveyer as claimed in claim 3, in-

cluding means for reciprocating said carriage and said independently reciprocable. means in a manner to' cause the carriage to reverse its direction of travel after said reciprocable means has reversed its direction of travel.

10. I11 a conveyer adapted to move objects step by step lengthwise of a work support, the combination of laterally spaced means forming said support, a reciprocable carriage movable in one plane for a portion of its length of traveland in :a higher plane for the remainderof said length, and relatively fixed laterally spaced means reciprocable as aunit independently of but supported. by the carriage for movin the work lengthwise e' carriageis moving in said higher plane. g f 11. In a conveyer adapted to move -ob-= jects step by step along a Work support, the combination of reciprocablemeans movable in'oneplane for aportion of its length of travel and in a higher plane for the remainder of said'length, and object-supporting means "mounted on and reciprocable longitudinally of said means ,for elevating and moving the objects relatively to saidsupportwhen said means is moving in said higher plane.

' 12. In a conveyer as claimed fin claim 1, said independently reciprocable means comprising a, longitudinally extending frame work, and rollers interposed between said the latter.

carriage and said frame work for supporting 13. In a conveyer as claimed in claim 3, said independently reciprocable means comprismg a longitudinally extendlng frame work the under side of which is provided with a tr ick-way,'and rollers mountedon said carriage and cooperating with said track-way for supporting said frame work. 414:. In a conveyor as claimed in claim 3, said independently reciprocable means comprising'a longitudinallyextendingframework and rollers interposed between said carriage and said frame Work forisupportin g the latter. In testimony whereof I aflix my signature.

HORACE A, CARTWRIGHT; 

